Lever-lock



,8. S. MORTON.

LEVER LOCK.

APPLlcATloN FILED MAY 2o. \92o.4v

Patented June 21, 19251.

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SAMUEL M ORTON, OF HARRISBURG," PENNSYLVANIA.

y i, LEVER-LOCK. Y.

1,382,529. y v y i l i f :Appiiealiqnifiied traigo',

To f/ZZwzom t may conc-Vern.' w Y Be it' known thatlk, SAMUEL4 Monroiv, a citizen of the lUnited States, residing at Harrisburg, in the county ofA Daupliinand` State of Bennsylvania, have invented certain new and useful' Improvements in Lever;-

QLocks; and I do declare 'the followingto be locking Vdevices for levers or'shafts having l a full, clear, and Vexact''description of* the invention, such as will enable others skilled in the art "to which it appertains to make My invention 1 relates to improvements in both pivotal andr rotary movement, andthey present disclosure shows Vthe invention in connection with a control shaft fora transmission mechanism such as that illustrated in ymy co-pending application, Serial No. 323,709, filed SeptemberA 15, 1919. It is to be understood, however, that the device may be used on numerous levers and the, like in which it is necessary to normally hold them against either pivotal or rotary movement.

The principal object of the invention is to provide an extremely simple and inexpensive, yet a highly eflicient and reliable friction lock in which both pivotal and rotary movements of a control shaftor the like are normally prevented by theaction of common spring means acting on'friction shoes.

`With the foregoing in view, the invention resides in the novel construction andl arrangement of parts hereinafter described and claimed, the descriptive matter being supplemented by the accompanying draw-A ings.

Figure 1 tion. Y n

Fig. 2 is a vertical section on the plane indicated byline 2-2 of Fig. 1.

Fig. 3 is a horizontal section on the plane of line 3 3 of Fig. 1.

In the drawings above briefly described, the numeral l'designates a transmission casing and 2 has reference to Va Vvertical control shaft suitably mounted atA 3 for both pivotal and rotary movement, the upper end of said shaft having a hand wheel 4 while is a sidel elevation partly in secits lower end is appropriately connected at 5 with the transmission mechanism, which mechanism forms no part of the present application, but is illustrated in detail in the applicationl above referredto. It may be stated, however, that forward and rearward swinging of the shaft 2 controls the direc-Y tion'of drive and the speed, while rotation Specification of Letters Patent. y Ptgntgd June 217 v'1921.

le20. serial Nd. 382,856.1

ofsad shaftefl'cts steering. yTo holdthe shaft 2in any position at which it may be set, I employ the present invention, described specilically in the following. l

A'pairl of arched bars v(3 are suitably anchoredl atl 7 on the casing 1 or on any other fixed support, with at least aportion of their lengths concentricwth the joint 3, the shaft 2`being received between said bars so thatit'may move either forwardly orrearwardly, but can have novpivotal movement transverse to Ysaid bars.'A A collar S is secured toth'eshaft 2 above the. bars' and a friction shoe 9 is interposed between said collar and bars,while a similar shoe '10 contacts with the lower sides of these bars, the two shoes 9 and 10 having' central openings 11 through which the shaft 2. passes rather Y loosely. A collar 12 is secured on the shaft 2 below the shoe 104 and a coil spring v13 is interposed'between said collar and shoe. vThis spring exerts a downward force on the shaft 2 and an upward thrust on the shoe 1() and it will thus be seen that not only will the two shoes 9 and 1() be held in frictional contact with the bars v6, butV the collar 8 is held in similar contact with the upper surface of the shoe 9. By this arrangement, pivotal movement of the shaft is resisted by the action of the shoes 9 and 10 on the bars 6, while rotary movement of said shaftis normally prevented by the frictional Contact of the parts 8 and 9. The friction between the several parts can be overcome whenever the shaft 2 must be operated to control the transmission mechanism, but such friction isv sufHciently strong to normally hold'the shaft in any position at which it may be set.

Rotation of the shoes 9 and 10 `with the shaft 2 may be preventedk by any preferred mea-ns, butl prefer that such means shallv contact with the bars 6, and as typical of one form of construction which may be used for this purpose, I have shown a plurality of pins 14 carried by the shoe 9 and received rather loosely in openings 15 in the shoe 10. The pins 14 are positioned between and contact with the bars 6 and thusboth of the shoes are held against rotation although theyare freely movablel towaid each other under the action of the spring 13.

Since probably the'best results may be obtained :from the details described, such de tails may be followed ifdesired, but I `wish it Vunderstood that within the scope of the invention as claimed, numerous minor lio changes may be made. Furthermore, it is obvious that my Iinvention may be used on shafts or levers of numerous types, Whether they be .employed for controlling transmispurposes.

lever, a collar movable with said shaft-WhenV the latter is rotated,and spring means for engaging saidcollar withV said friction brake and for holding the latter in frictional contact with said track.V

2. The combination with a shaft having both pivotal and rotary movement; of a fixedA curved track extending transversely of said' shaft, a pair of friction shoes mov-` able yalong said trackfdurin the pivotal k movement of said shaft, a colar rotatable bodily With said. shaft and contacting with one of said`shoe's, and spring means acting myvhand in one direction lagainst the other shoe and V- in the opposite Ydirectionagainst 'said shaft,-

Whereby to frictionallyl enga e both shoes with the track andto frictiona ly retain saidl collar in contact Withoneof Said shoes.

3. The combination v'With a shafthaving both rotary and` pivotal movement, of

curved tracks between which said shaft is movable,rsaid tracks being concentric lwith the pivotal axis of thesha'ft, a'pairjvofffri'ction' slioescontacting vWithiopposite sides of said tracks, said shoes having* openings 'receivingsaid sha-ft and gbeing provided with track engaging meansholding them against.. rotation, a collar rotatable with said shaft and contactingwitli one'of said shoes, 'andi acoil spring surrounding said shaft, said;V

spring acting in .one direction against .the

other kshoeland in the` OPPSite' direction Y* against said shaft.

Intestimony whereof I.V have hereunto 'set sAMUEL-fs-iiofnronj 

